Barrel key cutting machine



53 512 54d J9 Ng 23 @L Oct. 23, 1934. J CARON l 1,978,009

BARREL KEY CUTTING MACHINE Filed June 15, 19:54 2 sheets-sheet 1 L@ el aaron er y mw AMM mummia,

Oct. 23, 1934. J. CARON BARREL KEY CUTTING MACHINE Filed June 15, 1934 2 Sheets-Sheet 2 Imag-? u? era-Garon atenteciy Oct. 23, 1934 y y 19978,@09

UNlTEosT-ATES PATENT FFICE l l Y 1,978,009 BARREL Knr onrriNG MACHINE Ludger J. Caron, Leominster, Mass., assigner to `Iimlepemient Lock Company, Fitchburg, Mass., Va corporation of Massachusetts ApplicationJune 13, 1934, Serial No. 730,527

Claims. (Cl. 90-13.05)

This invention relates to a machine for cutmade on the circumference of the tube and beting barrel keys. ing of course of different depths.

The principal .objectsofsthe invention are to The key also has a radial projection l2 Ifor provide means by .which a key blank of the guiding it into the proper position in the lock as `li barreltype can be made emciently and expediit has to be located circumferentially inorder to 30 tiously from a completed key; to provide a gauge t the lock. l i l which will indicate automatically the depth of The machine is shown as provided with a base the cut ona cut key and an adjustable stop that 13 having `two standards 14 and 15, preferably can be set in accordance with said gauge so that integral with it and extending up from it ycen- `10 the cutting itool and key lblank will be brought traily. On the standard 14 are located bearings 65 together just far enoughto cut the blank to that in which is rotatably mounted a spindle 16 havdepth; to providea holder for the key blank roing a pulley 17 for operation by a belt 18 or it .tatable on `the axis of the blank to allow the can be operated in any other desiredv way.` On :key blank to be .turned on its own axis a series the other end of the spindle is a chuck or other i115 Jofsteps equal to thenumberof possible cuts on tool `holder 19 for receiving centrally a cutting 7,0 the keyand properly spaced, in combination with tool 20 in the form of a `flat ended drill. This a cutter, set -eccentrically withregard to the axis constitutes the entire cutting apparatus. 1 `'of the key blank for cutting into .the edge of the `Gn the standard l5 are located bearings spaced :barrel 4shaped blank; .and toprovide 'theseparts apart for a shaft'22. There is a space between tzu fsofrelated as to constitute a vneat and compact the two bearings for this shaft and within that .75 machineyeasy to operate and having few .parts space is located a spring 23 bearing against a likely vto get out of order.' i collar 24 iixed on the shaft and forcing the shaft 'Other objects and advantages :ofthe invention back until the collar engages the solid part of wills-appear hereinafter. i l the frame. An operating handle 25 is shown :H25 Reference is 'to be had toxthe accompanying having a pin 26 engaging the end of the shaft for `80 drawings, in :which moving the shaft forward.

Fig. 1 is la iside' elevation of'a :machine con- On the shaft at its opposite end `is integrally structed in Iaccordance with thiszinvention; ,mounted an indicating hub 27 having a series of j FigZIisasplan of thesame;` i notches `28 on 'its `circumference for receiving a 30 Fig. 3 is a plan of abarrel fkeyhcut :on this spring-pressed stop 29. These notches are cut `85 machine; r 1 i with a slant in one directionso that this hub can Fig. 4 is :amend View of the same showing .the be rotated step by step but in one direction only. 'position` of thearotating cutting `tool with respect On the frame is an arrow 30 indicating the zero `thereto "whenmaking one 'of `the cuts;` :s -point and on the hub is a second arrow 31 'in- :1.35 ..Fig. 5-is an Yendviewofthe. blank -holdingpart Idicatingthe starting point, as will appear. y l90 fof` the machine `lookingxfromthe cutter` end of Projecting from the hub 2'7Mis a longitudinal the machine, `as indicated `by `the sectionvlinebar 38'preierably integral with `the hub and havfof'Fig. 1; l i 'ing a Atransverseend 32 provided with a dia- Fig. 46is1a sectionalview `onmthe line 6-6of metricalslit 33 and a xed pointer 34. A screw l D Fig, 1*; f35 is located at one endof this slot for tighten-` 95 Fig.` a'planlofthe cutting andblankahold- Aing it up and there is a `central recess 36 for .inglpartvof the machine; 1 n receiving a key blank set in from `the back, `as .Fig. `8 isa plan of `the indicating :part ofthe shown. There is also a radial notch .37 forre- 'machine `with parts inusection, and ceiving lthe outer projection 1210i the undercut 45 ',Fig. 9 :isa .horizontal .sectional viewshowing lkey blank S0 that this blank iS pOSVSly XeC .100

` the pinson which .the transversely out key is ap- 4with respect to the notchedhub .27. After :the pliedforldetermining .the cuts on the blank. 1 blank is inserted, it can be fastened bytightening This machine in the form in `which yit is illus- 11p the SCleW `35. itratedis designedfor the cuttingofacbarrel type The aXiS 0f the Shaftf22 and 0f the key blank 50 of key 'used with barrel locks, although some 0f is Offset from the .aXiS df `the Spindle 16 vand `the `1435 fthe featuresof :the invention :can be applied to cutting tool 20 just ellllgh S0 that the edge '0f the flatztype 0f key. `This is an 01d type of 100k the cutting tool will cut `into the `edge .of lthe and key and this invention relates only Lto the blank. Thekey blank `lllIlS OrifiGS 0WD aXS by `@u1-,ting ofxtheskey Ofrcourse, the barrel key conthe rotation by hand of :the .hub27 :to bringit sistsrof .gambe .Squareq @x1-.the endi,hecutsnbemg sintopostion forrthecutter, `whichis mounted zon 11() lso a stationary axis, to make the desired cuts around the circumference.

It will be understood that the cutting operation is performed. by pressing on the handle 25 and forcing the whole structure carried by the shaft 22 toward the constantly rotating cutter 20. When one cut has been performed the handle is released, the spring pulls the shaft back and then the hub 27 is turned another notch and the operation repeated in a different place around the circumference of the key blank.

The machine is provided with an adjustable stop. This consists of a fixed screw 40 on the standard 15 and the stop in the form of a disc 41 having a starting mark 42 and a series of numerals equally spaced. On the integral memybei' 43 of the standard 15 is mounted a stationary'pointer 44. As this disc is threadedly engaged with the screw 40 it will move forward and back in accordance with the numerals on its circumference and it is located in such a position that the hub 27 engages it when the handle 25 is pushed inwardly. This limits the motion of the shaft and the key blank in accordance with the position of the disc 41 on its screw.

In order to provide a simple and effective means for showing where the stop disc 4l should be placed, that is, what numeral thereon should be placed in registration with the pointer 44, a gauging device is provided. This consists of a pin 46, mounted on the head of the standard 14 and preferably on the top thereof, this pin fitting the interior of the barrel key that has been cut and provided with a longitudinal slot 47 for receiving the projection 12. This pin is provided with a circumferential groove 48 and is set into an opening through the top of the standard 14 which ts the pin. A set screw 49 is inserted to hold the pin in a fixed position, longitudinally, but it is capable of being turned on its own axis on account of the set screw setting into the groove 48 but not restricting the rotation of the pm.

Above the pin 45 are located two spring pressed reciprocable pins 50 and 51, in alignment, the pin 50 projecting over the pin 46 and parallel to it. The spring normally forces these pins outwardly. Between these pins is a space into which projects the end of an indicating needle 52, which is pivoted on an axis 53 at the side. The indicating end of the needle 52 moves over a scale 54 provided with numerals.

In operation a key, already cut, is placed on the pin 46 and it can be placed in only one position thereon because of the groove 47 and projection 12. It is turned, with this pin 46, until one of the cuts registers with the pin 50. Then it is pushed in until the end of the key engages the surface of the supporting part in which the pin 46 is located. `This pushes in the pin 50 a distance controlled by the depth of the c'ut o-n the key. The result is that the pointer 52 moves along the scale 54 and in the instance shown, indicates that the depth of the cut is 4. The stop disc 41 is turned until the numeral 4 thereon registers with the pointer 44 and that xes this stop disc so that when the handle 25 is moved to push up the shaft 22, it can be moved only so far as to allow the cutter 20 to cut into the key blank 10 a distance indicated by the numeral 4. In other words, it is a number 4 cut.

When this cut has been completed by this means the handle 25 is released, the shaft 22, moves back, and the operator pulls the cut key out along the p'm 46 and turns it through one space and then presses it back to move the pointer 52 to a different position. Then the hub 27 is moved through one space to turn the key blank for the next cut. The stop disc 41 is then turned to agree with the numeral on the scale 54 and the handle 25 is moved up to perform the second out.

This constitutes a very simple way of operating to reduce the desired and necessary cuts on a key blank and the machine is simple and easily operated.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:-

1. In a machine for cutting barrel key blanks, the combination of a rotary work spindle having a cutting tool, a shaft arranged eccentrically With respect to the spindle but on a parallel axis and located entirely beyond the end of the work spindle, means carried by said shaft for holding the blank to be cut in such position that the cutting tool will cut an arc on the edge of the blank, and means for moving the shaft toward the work spindle and into such position that the tool will out into the edge of the blank.

2. In a machine for cutting keys of the barrel type, the combination with a work spindle and a cutter thereon, said spindle being rotatable on its own axis, of a shaft located on an axis parallel with said axis and beyond the tool, means integrally mounted on the shaft to hold the blank to be cut, the shaft being rotatable on its axis, and means by which the shaft can be turned through an arc equal to the arc between two cuts to be made on the blank.

3. In a machine for cutting keys of the barrel type, the combination with a work spindle and a cutter thereon, said spindle being rotatable on its own axis, of a shaft located on an axis parallel with said axis and beyond the tool, means integrally mounted on the shaft to hold the blank to be cut, the shaft being rotatable on its axis, means by which the shaft can be turned through an arc equal vto the arc between two cuts to be made on the blank, a spring for holding the shaft back in inoperative position, and a lever having a projection for engaging the end of the shaft, whereby the motion of the lever will move the shaft up to cutting position.

4. In a machine for cutting barrel key blanks, the combination of a rotaryspindle having a cutting tool on the end thereof, with a rotatable and longitudinally movable shaft, a holder on the shaft for the cutting blank arranged in position to locate the key blank in a position eccentric with respect to the spindle, .a disc on the shaft by which it can be turned by hand, and a spring stop for the disc, said disc having notches for engaging the spring stop in a plurality yof predetermined positions, and'of a shape to prevent the disc and shaft from being rotated backwardly,

5. In a machine. for cutting barrel type key blanks, the'r combination with a rotary spindle vand a cutting tool carried at its end, of a shaft located entirely beyond the cutting tool, said shaft having an integral holder for the key blank thereon, and a disc on the shaft by which the shaft can be turned to different positions to bring the key blank into proper position for cutting, the shaft being provided with a wide space between the key holder and the disc, for the purpose described.

6. In a machine for cutting barrel key blanks, the combination of a rotary spindle having a cut- Gil ting tool, a shaft arranged eccentrically with respect to the spindley but on a parallel axisand located entirely beyond the end of the work spindle, means carried by said shaft for holding the blank to be cut in such position that the cutting tool will cut an arc on the edge of the blank, means for moving the shaft toward the work spindle and into such position that the tool will cut into the edge of the blank, and an adjustable stop in position to prevent the motion of the shaft toward the spindle in the proper place to enable the tool to cut the key to the desired depth.

"7. In a machine for cutting barrel key blanks,

. the combination of a` rotary spindle having a cutting tool on the end thereof with a rotatable and longitudinally movable shaft, a holder on the shaft for the cutting blank arranged in position to locate the key blank in a position eccentric with respect to the spindle, a disc on the shaft by which it can be turned by hand, a spring stop for the disc, said disc having notches `for engaging the spring stop in a plurality of predetermined positions, and of a shape to prevent the disc and shaft from being rotated backwardly, a stationary screw, a stop disc threaded on said screw,v whereby the turning of the stop disc will effect its adjustment along the screw, and means on the shaft for engaging the stop disc to limit the motion of the shaft toward the tool for the purpose described.

8. In a machine for cutting barrel key blanks, the combination with a spindle and a cutting tool `mounted on the end thereof, of a shaft reciprocable toward and from the cutting tool and mounted eccentrically with respect to the spindle, means on the shaft for holding the key blank, a 'gauge for receiving a previously cut key having a pointer, a scale adapted to indicate with the pointer the depths of the cuts on the key, a longitudinally adjustable stop disc having numerals thereon corresponding with the numerals on the scale, and a pointercooperating with the stop disc whereby, when the stop disc is set at the same number relative to said pointer that appears on the scale, the stop disc will stop the shaft from being moved beyond the point at which the cutter will cut the blank to the same depth as the key.

9. In a machine for cutting barrel key blanks, the combination with a spindle and a cutting tool mounted on the end thereof, of a shaft reciprocable toward and from the cutting tool and mounted eccentrically with respect to the spindle, means on the shaft for holding the key blank, a gauge for receiving a previously cut key having a pointer, and a scale adapted to indicate with the pointer the depths of the cuts on the key.

10. In a gauge for a key cutting machine, the combination of a pin on which a previously cut barrel key is adapted to be mounted, said pin having means for causing it to turn on its axis when the key is turned, a spring pressed pin above the rst named pin and parallel therewith at such a distance from the rst pin that the second pin will enter the cuts in the end of a barrel key placed on the first pin, a pivoted pointer, and a scale, said pointer being connected with the second pin to be moved thereby when the cut key is pressed in to indicate the depth of the cut on the scale.

LUDGER J. CARON. 

